And you get presents for eight days because -- I mean seven days, because God made the, created the earth in seven days and on the seventh day he rested."

VOA: special.2009.12.21

The Earth seems to be a pretty good inertial system, because on the ground, you leave something, it stays there.

地球看上去是个不错的惯性系,因为什么东西放在地上,都会保持静止

耶鲁公开课 - 基础物理课程节选

And this is because we could effortlessly produce and understand sentences that no human has ever said before on earth.

这是因为我们可以毫不费力地创造和理解,那些世上从未有人说过的句子

耶鲁公开课 - 心理学导论课程节选

"What on earth is going on?" Some analysts say discontent is bubbling up from the Pakistani middle class because of U.S.restrictions on visas and increased screening after recent bomb attempts.

VOA: standard.2010.05.06

It's a useful concept on the Earth, because Earth is approximately inertial.

这种观点在地球上很有用,因为地球很接近惯性状态

耶鲁公开课 - 基础物理课程节选